I just got a 64 40hp big twin evinrude. It will start up on starting fluid but will not idle or even keep running on starting fluid. The fuel pump is pumping some fuel and I cleaned the carburettor bowl out. Should the safety switch have power with the key in the run position? And could the safety switch cause the engine to die after letting of the ignition key fro the start position? It won't start without staring fluid witch made me think it was a fuel pump or carb problem but since it won't run on starting fluid makes me think its an ignition problem? Any ideas?